.vat-calculator {
  width: min(100%, 720px);
}

.vat-select,
.vat-calculator input[type="number"] {
  width: 100%;
  min-height: 3.2rem;
  padding: 0.8rem 3rem 0.8rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font: inherit;
}

.vat-select {
  background-image: var(--select-arrow);
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1rem;
  appearance: none;
}

.vat-select:focus,
.vat-calculator input:focus {
  outline: 0;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.12);
}

.vat-result {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.vat-result h2 {
  margin: 0 0 var(--spacing-sm);
  font-size: var(--font-size-lg);
}

.vat-result dl > div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border-color);
}

.vat-result dl > div:last-child {
  border: 0;
  font-weight: 700;
}

.vat-result dd {
  margin: 0;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.vat-table-wrap {
  max-width: 100%;
  overflow-x: auto;
  margin: 1rem 0;
}

.vat-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
}

.vat-table th,
.vat-table td {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.vat-table th {
  background: var(--bg-tertiary);
}

.vat-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 1.5rem 0 2rem;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: #fff;
}

.vat-toc strong {
  flex-basis: 100%;
}

.vat-updated {
  margin-top: 2rem;
  color: var(--text-tertiary);
  font-size: var(--font-size-xs);
}

/* Shared visual system for the VAT tools and rate guide. */
.tool-hero {
  padding: 3.25rem 0 3.75rem;
}

.tool-hero .container {
  gap: 0.65rem;
}

.tool-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 1.7rem;
  padding: 0.25rem 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.09em;
}

.tool-hero h1 {
  max-width: 920px;
  margin: 0.25rem auto 0;
  line-height: 1.15;
}

.tool-hero .hero-subtitle {
  max-width: 760px;
  margin: 0 auto;
  line-height: 1.55;
}

.tool-hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.25rem;
  margin-top: 0.35rem;
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.9rem;
}

.calculator-card {
  width: min(100%, 760px);
  margin-top: 1.25rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.calculator-card .input-group {
  margin-bottom: 1.15rem;
}

.calculator-card .input-group label {
  margin-bottom: 0.45rem;
}

.calculator-mode {
  margin-bottom: 1.2rem;
}

.calculator-fields {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(220px, 0.8fr);
  gap: 1rem;
}

.calculator-fields .input-group {
  min-width: 0;
}

.calculator-card input[type="number"] {
  min-height: 3.45rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.calculator-submit {
  display: flex;
  width: 100%;
  min-height: 3.35rem;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  margin-top: 0.2rem;
  font-size: 1rem;
}

.calculator-submit span:last-child {
  font-size: 1.25rem;
  line-height: 1;
}

.calculator-hint {
  margin: 0.75rem 0 0;
  color: var(--text-tertiary);
  font-size: 0.85rem;
  text-align: center;
}

.calculator-card .vat-result {
  margin-top: 1.25rem;
  padding: 1.1rem 1.25rem;
  border-color: #bfdbfe;
  background: #f1f7ff;
}

.tool-support-section {
  padding: 0.75rem 0 3.5rem;
  background: var(--bg-secondary);
}

.tool-ad-banner {
  margin-top: 0;
  margin-bottom: 2.25rem;
}

.tool-article-layout {
  align-items: start;
}

.tool-article-layout .article-content,
.vat-guide-layout .article-content {
  padding: clamp(1.25rem, 3vw, 2.25rem);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.tool-article-layout .article-content h2:first-child {
  margin-top: 0;
}

.section-heading {
  margin-bottom: 1.75rem;
}

.section-heading h2 {
  margin-top: 0.5rem;
}

.section-heading p {
  margin-bottom: 0;
  color: var(--text-secondary);
}

.tool-kicker-light {
  border-color: #bfdbfe;
  background: #eff6ff;
  color: var(--primary-blue-dark);
}

.formula-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin: 1.5rem 0 2rem;
}

.formula-card {
  min-width: 0;
  padding: 1.1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #fff, #f8fbff);
}

.formula-card h3 {
  margin: 0.55rem 0 0.35rem;
  font-size: 1rem;
}

.formula-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.formula-card code {
  display: block;
  margin-top: 0.75rem;
  padding: 0.55rem 0.65rem;
  border-radius: var(--radius-sm);
  background: #eff6ff;
  color: var(--primary-blue-dark);
  font-size: 0.8rem;
  overflow-wrap: anywhere;
}

.formula-index {
  display: inline-grid;
  width: 1.85rem;
  height: 1.85rem;
  place-items: center;
  border-radius: 50%;
  background: var(--primary-blue);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
}

.formula-card-featured {
  margin: 1rem 0 1.5rem;
  border-color: #bfdbfe;
  background: #f1f7ff;
}

.formula-card-featured code {
  margin: 0 0 0.65rem;
  padding: 0;
  background: transparent;
  font-size: 1rem;
  font-weight: 700;
}

.formula-card-featured p {
  margin-bottom: 0;
}

.vat-info-callout {
  margin: 1.5rem 0;
  padding: 1.15rem 1.25rem;
  border-left: 4px solid var(--primary-blue);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: #eff6ff;
}

.vat-info-callout h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.vat-info-callout p {
  margin: 0;
}

.tool-link-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin: 1rem 0 1.75rem;
}

.tool-link-cards a {
  display: flex;
  min-height: 6rem;
  flex-direction: column;
  justify-content: center;
  gap: 0.35rem;
  padding: 1rem 1.15rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  text-decoration: none;
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.tool-link-cards a:hover {
  transform: translateY(-2px);
  border-color: #93c5fd;
  box-shadow: var(--shadow-md);
}

.tool-link-cards strong {
  color: var(--primary-blue-dark);
}

.tool-link-cards span {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.tool-article-layout .article-sidebar .ad-container,
.vat-guide-layout .article-sidebar .ad-container {
  min-height: 600px;
}

.vat-guide-section {
  padding: 0.75rem 0 4rem;
  background: var(--bg-secondary);
}

.vat-rate-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 0 auto 2rem;
}

.vat-rate-cards-hero {
  width: min(100%, 980px);
  margin: 1.15rem auto 0;
}

.vat-rate-card {
  display: flex;
  min-height: 170px;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 1.35rem 1.5rem;
  border: 1px solid var(--border-color);
  border-top: 4px solid var(--primary-blue);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow-sm);
  color: var(--text-primary);
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.vat-rate-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.vat-rate-reduced {
  border-top-color: #10b981;
}

.vat-rate-low {
  border-top-color: #f59e0b;
}

.vat-rate-cards-hero .vat-rate-card {
  min-height: 150px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 10px 28px rgba(0, 36, 92, 0.13);
  color: #fff;
  backdrop-filter: blur(8px);
}

.vat-rate-cards-hero .vat-rate-card:hover {
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.19);
  box-shadow: 0 14px 32px rgba(0, 36, 92, 0.2);
}

.vat-rate-cards-hero .vat-rate-number,
.vat-rate-cards-hero .vat-rate-name {
  color: #fff;
}

.vat-rate-cards-hero .vat-rate-description {
  color: rgba(255, 255, 255, 0.86);
}

.vat-rate-number {
  color: var(--primary-blue-dark);
  font-size: 2.5rem;
  font-weight: 750;
  letter-spacing: -0.05em;
  line-height: 1;
}

.vat-rate-number span {
  margin-left: 0.08em;
  font-size: 1.4rem;
}

.vat-rate-name {
  margin-top: 0.55rem;
  font-weight: 700;
}

.vat-rate-description {
  margin-top: 0.2rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.vat-guide-layout .article-content h2:first-of-type {
  margin-top: 1.5rem;
}

.vat-guide-layout .article-content h2 {
  scroll-margin-top: 1.5rem;
}

.vat-guide-layout .vat-info-callout {
  margin: 1.25rem 0 1.75rem;
}

.tool-faq {
  margin-top: 2.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--border-color);
}

.tool-faq h2 {
  margin: 0 0 1rem;
}

.tool-faq details {
  margin: 0.65rem 0;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: #fff;
}

.tool-faq summary {
  position: relative;
  padding: 1rem 3rem 1rem 1rem;
  color: var(--text-primary);
  font-weight: 650;
  line-height: 1.45;
  cursor: pointer;
  list-style: none;
}

.tool-faq summary::-webkit-details-marker {
  display: none;
}

.tool-faq summary::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 1.15rem;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 1.5px solid var(--text-secondary);
  border-bottom: 1.5px solid var(--text-secondary);
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--transition-fast);
}

.tool-faq details[open] summary::after {
  transform: translateY(-20%) rotate(225deg);
}

.tool-faq details p {
  margin: 0;
  padding: 0 1rem 1rem;
  color: var(--text-secondary);
}

.tool-faq summary:focus-visible {
  outline: 3px solid rgba(0, 102, 204, 0.25);
  outline-offset: 2px;
}

@media (max-width: 480px) {
  .vat-result dl > div {
    flex-direction: column;
    gap: 0.15rem;
  }

  .vat-result dd {
    text-align: left;
  }
}

@media (max-width: 768px) {
  .tool-hero {
    padding: 2.25rem 0 2.75rem;
  }

  .tool-hero h1 {
    font-size: clamp(1.9rem, 8vw, 2.4rem);
  }

  .tool-hero .hero-subtitle {
    font-size: 1.05rem;
  }

  .tool-hero-meta {
    gap: 0.3rem 0.8rem;
    font-size: 0.8rem;
  }

  .calculator-fields,
  .formula-cards,
  .vat-rate-cards {
    grid-template-columns: 1fr;
  }

  .vat-rate-card {
    min-height: 135px;
  }

  .tool-ad-banner {
    min-height: 130px;
    margin-bottom: 1.25rem;
  }

  .tool-support-section {
    padding: 1.25rem 0 2.5rem;
  }

  .vat-guide-section {
    padding: 0.75rem 0 2.5rem;
  }

  .tool-article-layout .article-content,
  .vat-guide-layout .article-content {
    padding: 1.15rem;
  }

  .tool-link-cards {
    grid-template-columns: 1fr;
  }

}